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(해미읍성)
This flatland fortress, designated Historic Site No. 116, was constructed in the early Joseon Dynasty. Visitors can walk along the 1.8 km wall. The site carries deep historical significance as a persecution ground for Catholic believers in the late Joseon era. Reconstructed government offices and a prison are located inside the walls. The fortress hosts seasonal traditional performances and festivals.
프란치스코 교황방문기념관
This castle is one of the most noted places in Seosan. General Yi Sun-sin worked here for a while. Over hundred Korean Christians were executed here during Joseon Dynasty. Seosan City Government is developing tourism programs based on this place, including Haemieupseong Festival.
서산 김기현 가옥, 서산 경주김씨 고택